package com.itheima.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.HashMap;
import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    /**
     * 设置静态资源映射
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始进行静态资源映射...");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
        log.info("{}----->{}","/backend/**","classpath:/backend/");
        log.info("{}----->{}","/front/**","classpath:/front/");
        log.info("前端映射放行完成");
    }

    //配置消息转换器 覆盖原来的
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters){
        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
        //把自定义的消息映射覆盖掉原来的消息映射
        converter.setObjectMapper(new JacksonObjectMapper());
        //把自定义的消息转换器加入到消息转换的集合中 生效顺序index=0
        converters.add(0,converter);

        log.info("消息转换器准备完毕...");
    }
}
